Abstract
We describe a geometric theory classified by Connes-Consani’s epicylic topos and two related theories respectively classified by the cyclic topos and by the topos \([{\mathbb N}^{\ast }, \textbf {Set}]\).
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Acknowledgments
We warmly thank Alain Connes for useful discussions on the subject matter of this paper.
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Supported by a CARMIN IHÉS-IHP post-doctoral position whilst writing this paper.
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Caramello, O., Wentzlaff, N. Cyclic Theories. Appl Categor Struct 25, 105–126 (2017). https://doi.org/10.1007/s10485-015-9414-y
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DOI: https://doi.org/10.1007/s10485-015-9414-y